JAVA&C# MD5加密

C#:

 

        public static string GetMD5(string myString)
        {
            MD5 md5 = new MD5CryptoServiceProvider();
            byte[] fromData = System.Text.Encoding.Unicode.GetBytes(myString);
            byte[] targetData = md5.ComputeHash(fromData);
            string byte2String = null;
            for (int i = 0; i < targetData.Length; i++)
            {
                byte2String += targetData[i].ToString("X2");
            }
            return byte2String;
        }

 

JAVA:

 

import java.io.UnsupportedEncodingException;

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;

/**

 * Md5加密

 * 

 * @author 

 */

public class Md5Encrypt {

    /**

     * Used building output as Hex

     */

    private static final char[] DIGITS = { '0', '1', '2', '3', '4', '5', '6',

           '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };

 

    /**

     * 对字符串进行MD5加密

     * @param text 明文

     * @param charSet 字符编码

     * @return 密文

     */

    public  static final String encrypt(String text, String charSet) {

       MessageDigest msgDigest = null;

       try {

           msgDigest = MessageDigest.getInstance("MD5");

       } catch (NoSuchAlgorithmException e) {

           throw new IllegalStateException("System doesn't support MD5 algorithm.");

       }

       //charSet为null时，不重新编码

       if(charSet != null){

           try {

              msgDigest.update(text.getBytes(charSet)); //注意该接口是按照utf-8编码形式加密

           } catch (UnsupportedEncodingException e) {

              throw new IllegalStateException("System doesn't support your  EncodingException.");

           }

       }

      

       byte[] bytes = msgDigest.digest();

       return new String(encodeHex(bytes));

    }

   

    /**

     * 对字符串进行MD5加密  默认为UTF-8编码

     * @param text 明文

     * @return 密文

     */

    public  static final String encrypt(String text) {

       return encrypt(text, "UTF-8");

    }

 

    private static final char[] encodeHex(byte[] data) {

       int l = data.length;

       char[] out = new char[l << 1];

       // two characters form the hex value.

       for (int i = 0, j = 0; i < l; i++) {

           out[j++] = DIGITS[(0xF0 & data[i]) >>> 4];

           out[j++] = DIGITS[0x0F & data[i]];

       }

       return out;

    }

}